@Misc{macdonald_laga_youtube_2015,
author = {Macdonald, Alan},
year = {2015},
title = {Geometric Algebra Videos Series on Youtube},
url = {https://www.youtube.com/playlist?list=PLLvlxwbzkr7igd6bL7959WWE7XInCCevt}
}

@Misc{macdonald_vagc_youtube_2016,
author = {Macdonald, Alan},
year = {2016},
title = {Geometric Calculus Videos Series on Youtube},
url = {https://www.youtube.com/playlist?list=PLLvlxwbzkr7i6DlChcYEL7nJ8R9ZuV8JA}
}